Changeset 622:f5a2eb76ff09


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05/08/08 20:28:00 (2 years ago)
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Howard Butler <hobu.inc@…>
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svn:1766ff46-f334-0410-ab20-d63176f87757/trunk@689
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update README

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  • README

    r435 r622  
    1 *************************************************************** 
    2 libLAS -- A C++ library for reading and writing LAS LiDAR data  
    3 *************************************************************** 
     1============================================================================== 
     2libLAS - LAS 1.0/1.1 ASPRS LiDAR data translation toolset 
     3============================================================================== 
    44 
    5 This library is available under the terms of the `BSD License`_  
    6 for reading and writing LAS `LIDAR`_ data. It was originally developed by  
    7 `Martin Isenburg and Jonathan Shewchuk`_ of the  University of North Carolina.  
    8 Continuing development by Mateusz Loskot and Howard Butler is supported by  
    9 the `IGSB`_ of the Iowa DNR for use in its state-wide `LIDAR`_ project. 
     5libLAS is a BSD library for reading and writing ASPRS LAS version 1.0 and 1.1  
     6data.  LAS-formatted data is heavily used in `LiDAR`_ processing operations, and  
     7the LAS format is a sequential binary format used to store data from sensors  
     8and as intermediate processing storage by some applications.   
    109 
    11 The library currently only reads/writes LAS 1.0 and 1.1 data.  LAS 2.0 support 
    12 is not scheduled to be developed in the near future.  The library provides  
    13 both a C and a C++ API along with some utility applications for manipulating  
    14 LAS files (they utilize the C API).   
     10libLAS is available under the terms of the `BSD License`_. It builds on work  
     11by `Martin Isenburg and Jonathan Shewchuk`_ of the  University of North  
     12Carolina in their `LAStools`_ project.  The base C++ library that reads  
     13and writes LAS 1.0/1.1 data was replaced with new development, and Martin's  
     14tools were ported to use this new code. 
    1515 
    16 Limitations 
    17 ~~~~~~~~~~~~~~~~~~~~~~~ 
     16libLAS' initial development was supported by the `IGSB`_ of the Iowa DNR  
     17for use in its state-wide `LIDAR`_ project. 
    1818 
    19 As of version 0.9.0, the following is not supported: 
     19Download 
     20------------------------------------------------------------------------------ 
    2021 
    21  - Variable length headers (will be complete by 1.0.0) 
    22  - Spatial reference interpretation 
    23  - txt2las (port to new library is not complete) 
    24  - lasdiff (port to new library is not complete) 
     22The latest version of libLAS can be downloaded from 
     23http://liblas.org/wiki/Releases 
    2524 
    26 Installation 
    27 ~~~~~~~~~~~~~~~~~~~~~~~ 
     25FAQ 
     26------------------------------------------------------------------------------ 
    2827 
    29 See INSTALL for notes how to install libLAS on unix-like platforms.  Windows  
    30 installation should be a simple as copying the dll and library executables to  
    31 a path in which you wish to run them from. 
     28The FAQ is available from http://liblas.org/wiki/FAQ 
    3229 
    33 ------------------------- 
     30State of the Library 
     31------------------------------------------------------------------------------ 
     32 
     33libLAS provides excellent coverage of the ASPRS LAS 1.0 and 1.1 specifications,  
     34but it only provides weak support for the concept of variable length records.   
     35Notably, libLAS concentrates on reading and writing point data for processing  
     36pipelines and it does not concentrate on vendor-specific items for which  
     37variable length records would likely be used.  It is hoped that libLAS'  
     38coverage of these items will be improved in the future.  Contact the `Authors`_  
     39if you have money burning a hole in your pocket to implement these items :) 
     40 
     41Another deficiency with libLAS as of version 0.9.6 is lack of support for  
     42coordinate reference systems descriptions and storage.  These are also part  
     43of the variable length header operations, but they are required as specified  
     44in the 1.0 and 1.1 spec.  It is hoped that libLAS will support these operations  
     45through the optional linkage of libgeotiff by the time 1.0 is released. 
     46 
    3447LAS Format Specifications 
    35 ------------------------- 
     48------------------------------------------------------------------------------ 
    3649 
    37 LAS Format standard documents in PDF format: 
     50The LAS Format Standard is maintained by `ASPRS Standards Committee`_. LAS  
     51format standard documents are available in PDF format: 
    3852 
    39 * `LAS 2.0 Format Standard`_ (2007-05-01) - *Proposed* 
     53* `LAS 2.0 Format Standard`_ (2007-08-17) - *Proposed* 
     54* `LAS 1.2 Format Standard`_ (2008-05-02) - *Proposed* 
    4055* `LAS 1.1 Format Standard`_ (2005-05-07) 
    4156* `LAS 1.0 Format Standard`_ (2003-05-09) 
    4257 
    43 The LAS Format Standard is maintained by `ASPRS Standards Committee`_. 
     58Authors 
     59------------------------------------------------------------------------------ 
    4460 
    45 ------------- 
    46 Mailing lists  
    47 ------------- 
     61The libLAS development team are: 
     62 
     63 * `Howard Butler`_ 
     64 * `Mateusz Loskot`_ 
     65 * `Phil Vachon`_ 
     66 
     67Special thanks to `Martin Isenburg and Jonathan Shewchuk`_ for their 
     68`LAStools`_ pioneering implementation of the ASPRS LAS standard that made  
     69development of the libLAS library possible. 
     70 
     71Mailing Lists 
     72------------------------------------------------------------------------------ 
    4873 
    4974* liblas-devel - http://mail.hobu.net/mailman/listinfo/liblas-devel 
    5075* liblas-commits - http://mail.hobu.net/mailman/listinfo/liblas-commits 
    5176 
    52 --------------------- 
    53 Subversion Repository 
    54 --------------------- 
     77Subversion Tree 
     78------------------------------------------------------------------------------ 
    5579 
    5680The SVN repository URL is available at http://liblas.org/svn 
    5781 
    58 * svn checkout http://liblas.org/svn/trunk/ 
     82:: 
    5983 
    60 ----------------- 
     84    svn checkout http://liblas.org/svn/trunk/ 
     85 
    6186License 
    62 ----------------- 
     87------------------------------------------------------------------------------ 
    6388 
    64 libLAS is `BSD licensed <http://www.opensource.org/licenses/bsd-license.php>`_.   
    65 See LICENSE.txt for a copy of the license. 
     89libLAS is available under the terms of the `BSD License`_.  
     90See `License`_ for a copy. 
     91 
     92libLAS Wiki 
     93------------------------------------------------------------------------------ 
     94 
     95* :trac:`LASElements LAS Format Elements` - comparison of elements of LAS Format 1.0 and 1.1   
     96* :trac:`Software` - list of geospatial software with reading and writing capabilities of LAS Format 
     97* :trac:`Resources` - list of LiDAR/LAS resources 
     98 
     99About Trac 
     100------------------------------------------------------------------------------ 
     101 
     102* `Trac <http://trac.edgewall.org/>`_ Open Source Project 
     103* :trac:`TracGuide` - Built-in Documentation 
     104* `TracFaq <http://trac.edgewall.org/wiki/TracFaq>`_ - Frequently Asked Questions 
     105* :trac:`TracSupport` - Trac Support 
     106* `reStructuredText Support in Trac <http://bitten.edgewall.org/wiki/WikiRestructuredText>`_ 
     107 
     108 
    66109 
    67110.. _`LIDAR`: http://en.wikipedia.org/wiki/LIDAR 
    … …  
    71114.. _`Martin Isenburg and Jonathan Shewchuk`: http://www.cs.unc.edu/~isenburg/lastools/ 
    72115.. _`LAS Format`: http://www.lasformat.org/ 
    73 .. _`LAS 2.0 Format Standard`: http://www.asprs.org/society/divisions/ppd/standards/asprs_las_format_v20.pdf 
    74 .. _`LAS 1.1 Format Standard`: http://www.asprs.org/society/divisions/ppd/standards/asprs_las_format_v11.pdf 
    75 .. _`LAS 1.0 Format Standard`: http://www.asprs.org/society/divisions/ppd/standards/asprs_las_format_v10.pdf 
     116.. _`LAS 2.0 Format Standard`: http://liblas.org/raw-attachment/wiki/WikiStart/incitsl1_las_format_v20.pdf 
     117.. _`LAS 1.2 Format Standard`: http://liblas.org/raw-attachment/wiki/WikiStart/LAS1_2_Final.pdf 
     118.. _`LAS 1.1 Format Standard`: http://liblas.org/raw-attachment/wiki/WikiStart/asprs_las_format_v11.pdf 
     119.. _`LAS 1.0 Format Standard`: http://liblas.org/raw-attachment/wiki/WikiStart/asprs_las_format_v10.pdf 
    76120.. _`ASPRS Standards Committee`: http://www.asprs.org/society/divisions/ppd/standards/standards_comm.htm 
    77 .. _`BSD License`: http://www.opensource.org/licenses/bsd-license.php 
     121.. _`Howard Butler`: http://hobu.biz 
     122.. _`Mateusz Loskot`: http://mateusz.loskot.net 
     123.. _`Phil Vachon`: http://www.geoscan.info 
     124.. _`BSD license`: http://www.opensource.org/licenses/bsd-license.php 
     125.. _`License`: http://liblas.org/wiki/License 
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